.login-wrap {
  width: 100%;
  height: 100vh;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: url(http://iot-admin.zhanway.com/themes/img/background.jpg);
  background-size: cover;
}
.login-title {
  text-align: center;
  font-weight: 500;
  color: #333;
  margin: 0 0 24px;
}
.login-form {
  width: 400px;
  border-radius: 8px;
  background: #fff;
  margin: 0 auto;
  padding: 24px;
}
.login-form-button {
  width: 100%;
}